Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Takeda Pharmaceutical Co Ltd
Original Assignee
Takeda Chemical Industries Ltd
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Filing date
Publication date
Application filed by Takeda Chemical Industries LtdfiledCriticalTakeda Chemical Industries Ltd
Priority to JP2565777ApriorityCriticalpatent/JPS6045194B2/en
Publication of JPS53111071ApublicationCriticalpatent/JPS53111071A/en
Publication of JPS6045194B2publicationCriticalpatent/JPS6045194B2/en
PURPOSE: To prepare the title compound useful as an anti-allergic agent, by reacting 4-oxo-4H-1-benzopiran-3-carbonitrile with hydroxylamine in the presence of water.
COPYRIGHT: (C)1978,JPO&Japio
JP2565777A1977-03-081977-03-08
Method for producing 2-aminochromone-3-carboxamide derivative
ExpiredJPS6045194B2
(en)